Aeration spray arm unit for use in swimming pools



FIG. 1 is a right, front perspective view of an aeration spray arm unit for use in swimming pools showing our new design with the undisclosed rear of the pipes and coupling elements being the same in appearance;

FIG. 2 is a top plan view thereof, the bottom view being a mirror image; and,

FIG. 3 is a right side new thereof, the left side view being a mirror image.

The undisclosed rear is plain and follows the contour as indicated. The pipe element is fragmentarily shown to indicate intermediate length.

In FIGS. 1 and 3, the pipe is shown broken away to indicate indeterminate length. 

The ornamental design for aeration spray arm unit for use in swimming pools, as shown and described. 